siisata broken?

I powered back up a machine that very, very long ago was build.netbsd.org,
to run some tests. It worked fine with its old (5.99) kernel, but with a
kernel built from yesterday's sources, its disks vanished, evidently because:
siisata0 at pci1 dev 5 function 0: vendor 0x1095 product 0x3114 (rev. 0x02)
siisata0: couldn't map global registers
Does this look familiar to anyone?
Thor